Owing to the merits of high catalytic activity,Pd-supported materials have received extensive attention.However,those materials always require complex and high-cost synthetic processes such as high-temperature calcination or H_2 reduction,which seriously hinder their wide applications.In this work,a novel Pd reduction method was developed for Pd-supported TiO_2catalysts,in which the Pd~(2+) ions were partly reduced and homogeneously loaded on the surface of 8nm TiO_2 with the assistance of pre-produced surface Ti~(3+) ions.This facile preparation is calcination-free and cost-low.The excellent catalysts can produce H_2 33 mmol/g/h under UV-vis light irradiation,and degrade nearly 10%methyl orange in 1 h visible-light irradiation,which is much higher than that of unloaded TiO_2 or Pd/TiO_2 prepared by traditional high-temperature calcination methods.Moreover,the resulting Pd-supported TiO_2 nano-catalysts are also effective for colorless phenol degradation under visible-light.The reasons for these superior activities can be assigned to the co-existence of Pd° and Pd~(2+) on the surface of TiO_2 nanoparticles,which is closely related to the calcination-free synthetic process.UV-Vis absorbance spectra show that the obtained0.53Pd/TiO_2 is visible-light-driven and nitrogen physisorption isotherms indicate a high specific surface area of 203 m~2/g.The preparation method reported herein may provide hints for obtaining other high photocatalytic activity Pd-based supported catalysts for hydrogen generation and methylene orange degradation. Owing to the merits of high catalytic activity, Pd-supported materials have acquired extensive attention. However those materials always require complex and high-cost synthetic processes such as high-temperature calcination or H_2 reduction, which seriously hinder their wide applications. This work, a novel Pd reduction method was developed for Pd-supported TiO 2 catalysts, where the Pd 2+ ions were partly reduced and homogeneously loaded on the surface of 8 nm TiO 2 with the assistance of pre-produced surface Ti ~ (3+ ). This facile preparation is calcination-free and cost-low. The excellent catalysts produce H 2 33 mmol / g / h under UV-vis light irradiation, and degrade nearly 10% methyl orange in 1 h visible-light irradiation, which is much higher than that of unloaded TiO 2 or Pd / TiO 2 prepared by traditional high-temperature calcination methods. Moreover, the resulting Pd-supported TiO 2 nano-catalysts are also effective for colorless phenol degradation under visible-light. for these superior activities can be assigned to the co-existence of Pd ° and Pd ~ (2+) on the surface of TiO 2 nanoparticles, which is closely related to the calcination-free synthetic process. UV-Vis absorbance spectra show that the obtained 0 .53Pd / TiO 2 is visible-light-driven and nitrogen physisorption isotherms indicate a high specific surface area of ​​203 m ~ 2 / g. The preparation method reported herein may provide hints for obtaining other high photocatalytic activity Pd-based supported catalysts for hydrogen generation and methylene orange degradation.